Thermometer.



Patented sept. 117, 1912.

MJ .uw y/ fooooooo' J. `GOWLING. THERMOMETER.

APPLICATION FILED JAN.11. 1911.

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Tolall @UIL-omit, may concern Be it known that l, JAMES CowLiNs, `a

citizen of' the United States, residingatv Galena, in the county of Jo Daviess and 5 State of Illinois, have invented' certain new and useful Improvements'in Thermometers; v

of which the following is a specification.

special reference to those of great size and length, and the leading object is to kecono mize in the 'operating fluid and still inaiiilI tain its Isensitiveness and accuracy. It consists 4in inserting in the fluid register tube` a .spacing member or body which shall largely fill said tube'.

A lt further consists in providing a fluid containing bulb preferably formed of `metal which 'shall present a large surface to the,

atmosphere and still Vlargely economize in, fluid whereby the same sensitiveness is maintained as in a small `ulb with a small .amount of fluid.

, These features will be fully'deve'loped and V vlv @presented in detail in the following specili- 25`cation when considered inconnection with vthe drawings accompanying the -same and forming apart hereof inwhich` 'Figure 1 isa perspective View of my device with the bo'X shown in dotted lines.

' i "0 Fig. 2 is a cross section through line 2-2 of Fig. 1, looking downward. Fig. 3 is a cross section of Fig. 1 on line Fig. 4 is a plan view of the rest for the inner member.

Fig. 5 is a perspective view of the `box that incases the bulb of the fluid receptacle.`

Like characters of reference denote corresponding parts in each of the drawings.

Referring to the drawings, 2 designates the register plate which is provided with a longitudinal opening 3 runningnearly the length of the plate. Said plate is supplied with the usual figures represented Vin this drawing, the degrees of temperature from 30o below zero to 160' above.v The same may be placed upon both sides of the plate so that it may be read byga party approaching: the thermometer from'vopposite directions. It is manifest `that this plate may have on it the registration of more or less number of degrees according'to the surroundings in which the thermometer is to be used. ln the opening 3 of the registration plate 2 is secured, in any well known manner, the register tube or member 4 which is sealed at the top 5 in the usual manner. This tube is secured in a bulb. 'receptacle 6 A' '.ri-in'niiiortirriin by inserting thelower end in the upper' end .rateareasepaiaiaia application mea-January 11,1911. sensing. 602,126.

of thereceptacle andthen surrounding it with packing, (preferably rubber) and securing 1twith 'a nut 10, whereby the tube will-be sealed air tight in thelreceptacle'.

t E orthe purpose of presenting a large sur I y face to the atmosphere and maintaining the My invention relates to thermometers with greatest sensitiveness, the receptacle 6 is preferably made of'thin sheet copper and enlarged by inserting in the body portion a plurality of tubes or compartments 1'5. By this mode of construction there is exposed' to the atmosphere a very large surface with. l only a small amount 'of fluid. 'The recepta'cl'e is secured in a box 16 by a set screw 18 through openings 20 which boX is provided with' openings 22.

YVithin the tube 4 is set a spacing ment ber 25 which is of such size as to largely fill the ltube 4. The member, if hollow, is-

sealed at both ends and held in the center of the tube 4 by wires 26. around thev member with points 28 extending'out fromthe inember and enga, ;in1 ;y the inner'side ofthe tube' 4. This'member-rests upon a crosspiece 3'0 Ithat is secured within the body of the fluid receptacle 0.

The mode of operating my deviceis subi stantially as follows. rlhe member 25 is sealed at both' ends, if it be a hollow tube,

and inserted into the tube 4 till it rests on the crosslpiecc 30 with the points 28 of the v `wires 26 engaging the inner Isides of the tube 4. rlhis will leave only a small space in the tube 4 around the member 25. The

fluid is introduced into the tube 4 at the top 5 and continued till the receptacle 6, with the compartment-s 15'are filled and around the member 25 till the fluid registers thesurrounding temperature of the atmosphere then the end 5 is sealed. The thermometer will then operate iii the same manner as other thermometers.

It willbe seen by this mode of construction, with the member 25 nearly filling the tube 4 and the bulb with the various coinpartments exposing a large surface of' thin ico Y copper to the atmosphere, that the delicate sensitivenessof the ordinary bulb will be maintained, also great economy in Huid and the thermometer may be made in two parts and of many feetin length.

'Having now described my invention what I claim. and desire. .to secure by Letters Patent is thermometer, comprising a slotted Y registering` plate, a thermometer tube arranged longitudinally 1n the slot; of said plate and projecting beyond the front andl rear lfaces of the latter, a fluidreeeptaele provided with separated fluid compartments, said receptacle being threaded at its upper end, peeking bet-Ween the thermometer t-ube and fluid receptacle, a nut embracing 'the thermometer tube and lsecuring the same 'to the threaded upper end of the fluid re'-4 ceptaele, a filler member arranged Within'the thermometer tube and extendmg substantially the entirev length thereof and being substantially evenly spaced from the walls thereof,. and a member extending across the thermometer tube and supporting the lower end of the filler member.

In testimony whereof I affix my signature in presence oft-wo witneses.

JAMES ooWLING.

Witnesses: Y

.M. M. GABY, A. B. HANSHAW. 

